package edu.dao;

import java.util.List;
import org.hibernate.LockMode;
import org.hibernate.criterion.Criterion;
import org.hibernate.criterion.DetachedCriteria;
import org.hibernate.criterion.MatchMode;
import org.hibernate.criterion.Order;
import org.hibernate.criterion.Restrictions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

import edu.model.User;
import edu.utils.DAOParams;

/**
 * A data access object (DAO) providing persistence and search support for User
 * entities. Transaction control of the save(), update() and delete() operations
 * can directly support Spring container-managed transactions or they can be
 * augmented to handle user-managed Spring transactions. Each of these methods
 * provides additional information for how to configure it for the desired type
 * of transaction control.
 * 
 * @see edu.model.User
 * @author MyEclipse Persistence Tools
 */

public class UserDAO extends HibernateDaoSupport {
	private static final Logger log = LoggerFactory.getLogger(UserDAO.class);
	// property constants
	public static final String USER_NAME = "userName";
	public static final String USER_PASSWORD = "userPassword";

	protected void initDao() {
		// do nothing
	}

	public void save(User transientInstance) {
		log.debug("saving User instance");
		try {
			getHibernateTemplate().save(transientInstance);
			log.debug("save successful");
		} catch (RuntimeException re) {
			log.error("save failed", re);
			throw re;
		}
	}

	public void delete(User persistentInstance) {
		log.debug("deleting User instance");
		try {
			getHibernateTemplate().delete(persistentInstance);
			log.debug("delete successful");
		} catch (RuntimeException re) {
			log.error("delete failed", re);
			throw re;
		}
	}

	public User findById(java.lang.Integer id) {
		log.debug("getting User instance with id: " + id);
		try {
			User instance = (User) getHibernateTemplate().get("edu.model.User",
					id);
			return instance;
		} catch (RuntimeException re) {
			log.error("get failed", re);
			throw re;
		}
	}

	public List findByExample(User instance) {
		log.debug("finding User instance by example");
		try {
			List<?> results = getHibernateTemplate().findByExample(instance);
			log.debug("find by example successful, result size: "
					+ results.size());
			return results;
		} catch (RuntimeException re) {
			log.error("find by example failed", re);
			throw re;
		}
	}

	public List<?> findByProperty(String propertyName, Object value) {
		log.debug("finding User instance with property: " + propertyName
				+ ", value: " + value);
		try {
			String queryString = "from User as model where model."
					+ propertyName + "= ?";
			return getHibernateTemplate().find(queryString, value);
		} catch (RuntimeException re) {
			log.error("find by property name failed", re);
			throw re;
		}
	}

	public List findByUserName(Object userName) {
		return findByProperty(USER_NAME, userName);
	}

	public List findByUserPassword(Object userPassword) {
		return findByProperty(USER_PASSWORD, userPassword);
	}

	public List findAll() {
		log.debug("finding all User instances");
		try {
			String queryString = "from User";
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
	public List findAllOderBy(String name, String order) {
		log.debug("finding all User instances order by" + name);
		try {
			String queryString = "from User order by " + name + " " + order;
			return getHibernateTemplate().find(queryString);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	

	public User merge(User detachedInstance) {
		log.debug("merging User instance");
		try {
			User result = (User) getHibernateTemplate().merge(detachedInstance);
			log.debug("merge successful");
			return result;
		} catch (RuntimeException re) {
			log.error("merge failed", re);
			throw re;
		}
	}

	public void attachDirty(User instance) {
		log.debug("attaching dirty User instance");
		try {
			getHibernateTemplate().saveOrUpdate(instance);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public void attachClean(User instance) {
		log.debug("attaching clean User instance");
		try {
			getHibernateTemplate().lock(instance, LockMode.NONE);
			log.debug("attach successful");
		} catch (RuntimeException re) {
			log.error("attach failed", re);
			throw re;
		}
	}

	public static UserDAO getFromApplicationContext(ApplicationContext ctx) {
		return (UserDAO) ctx.getBean("UserDAO");
	}
	

	public List findLimitOderBy(int firstResult, int maxResults, String name, boolean isAsc) {
		log.debug("finding limit User instances  order by" + name);
		try {
			DetachedCriteria dc = DetachedCriteria.forClass(User.class); 
			if(isAsc) {
				dc.addOrder(Order.asc(name));
			} else {
				dc.addOrder(Order.desc(name));
			}
			return getHibernateTemplate().findByCriteria(dc, firstResult, maxResults);
		} catch (RuntimeException re) {
			log.error("find all failed", re);
			throw re;
		}
	}
	
	@SuppressWarnings("unchecked")
	public List findByPropertiesOr( String[] attNames, String[] attValues, String[] ops ){
		
		DetachedCriteria dc = DetachedCriteria.forClass(User.class);
		Criterion temp = null;

		if( ops[0].equals( DAOParams.Dao_Like) ){
			temp = Restrictions.like(attNames[0], attValues[0], MatchMode.ANYWHERE );
		}
		else if( ops[0].equals( DAOParams.Dao_Equal) ){
			temp = Restrictions.eq(attNames[0], attValues[0] );
		}
			else if( ops[0].equals( DAOParams.Dao_NotEqual ) ){
			temp = Restrictions.ne( attNames[0], attValues[0] );
		}
		
		if(attNames.length >1 ) {
			for( int i = 1; i < attNames.length; i++ ){
				if( ops[i].equals( DAOParams.Dao_Like ) ){
					temp =	Restrictions.or(temp, Restrictions.like( attNames[i], attValues[i], MatchMode.ANYWHERE ));
					//System.out.println(temp.toString());
				}
				else if( ops[i].equals( DAOParams.Dao_Equal ) ){
					temp =	Restrictions.or(temp, Restrictions.eq( attNames[i], attValues[i] ));
				}
				else if( ops[i].equals( DAOParams.Dao_NotEqual ) ){
					temp =	Restrictions.or(temp, Restrictions.ne( attNames[i], attValues[i] ));
				}
			}
		}	
		dc.add(temp);	
		return this.getHibernateTemplate().findByCriteria(dc);
	}
}